You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aicontinue="Collection_Manager.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Calculator.png" timestamp="2011-11-14T03:44:18Z" url="https://wiki.countingopinions.com/images/2/23/Calculator.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Calculator.png" ns="6" title="File:Calculator.png" />
      <img name="Caledon_PL_Case_Study.pdf" timestamp="2011-10-26T13:13:13Z" url="https://wiki.countingopinions.com/images/5/57/Caledon_PL_Case_Study.pdf" descriptionurl="https://wiki.countingopinions.com/index.php/File:Caledon_PL_Case_Study.pdf" ns="6" title="File:Caledon PL Case Study.pdf" />
      <img name="Categorization_Steps.png" timestamp="2013-01-08T02:34:19Z" url="https://wiki.countingopinions.com/images/c/ce/Categorization_Steps.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Categorization_Steps.png" ns="6" title="File:Categorization Steps.png" />
      <img name="Change_PI_name_background.jpg" timestamp="2014-03-04T09:34:03Z" url="https://wiki.countingopinions.com/images/3/3c/Change_PI_name_background.jpg" descriptionurl="https://wiki.countingopinions.com/index.php/File:Change_PI_name_background.jpg" ns="6" title="File:Change PI name background.jpg" />
      <img name="Checkbox.png" timestamp="2013-01-08T02:28:16Z" url="https://wiki.countingopinions.com/images/7/72/Checkbox.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Checkbox.png" ns="6" title="File:Checkbox.png" />
      <img name="Checkmark.png" timestamp="2011-11-14T06:01:20Z" url="https://wiki.countingopinions.com/images/5/5a/Checkmark.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Checkmark.png" ns="6" title="File:Checkmark.png" />
      <img name="CollectionPeriodsGroup2.png" timestamp="2014-11-17T20:17:50Z" url="https://wiki.countingopinions.com/images/1/13/CollectionPeriodsGroup2.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:CollectionPeriodsGroup2.png" ns="6" title="File:CollectionPeriodsGroup2.png" />
      <img name="Collection_Management_-_Collection.png" timestamp="2011-11-14T03:30:42Z" url="https://wiki.countingopinions.com/images/2/2c/Collection_Management_-_Collection.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Collection_Management_-_Collection.png" ns="6" title="File:Collection Management - Collection.png" />
      <img name="Collection_Management_Status.png" timestamp="2011-11-14T05:38:41Z" url="https://wiki.countingopinions.com/images/7/71/Collection_Management_Status.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Collection_Management_Status.png" ns="6" title="File:Collection Management Status.png" />
      <img name="Collection_Management_Website.png" timestamp="2011-11-14T03:37:11Z" url="https://wiki.countingopinions.com/images/f/f7/Collection_Management_Website.png" descriptionurl="https://wiki.countingopinions.com/index.php/File:Collection_Management_Website.png" ns="6" title="File:Collection Management Website.png" />
    </allimages>
  </query>
</api>